Expansible lubricating-pjston



No. 626,6. Patented June 6, I899.

W. HAY.

EXPANSIBLE LUBRIGATING PISTON.

(Application filed Apr. 80, 1898) m: Nom'us FETERS co, PnoTouTnu.wlsumcmn. n. c.

UNITED STATES.

PATENT Fines.

\VALTER HAY, OF SEVILLE, OHIO, ASSIGNOR OF ONE-HALF TO EMERSON M.HOTOHKISS, OF WATERBURY, CONNECTICUT.

EXPANSIBLE LUBRlCATlNG-PISTON.

SPECIFICATION forming part of Letters Patent No. 626,611, dated June 6,1899.

Application 1116a April 20, 1898.

Serial No. 679,315. (No model.)

To all whom it may concern:

Be it known that I, \VALTER HAY, a citizen of the United States ofAmerica, and a resident of Seville, in the county of Medina and State ofOhio, have invented certain new and useful Improvements in ExpansibleLubrieating-Pistons, of which the following is a specification. I

My invention relates to improvements in trunk-pistons which are moreparticularly intended for use in connection with caloric or explosivemotor cylinders; and the objectsof my improvements are, first, toprovide for a suitable lubrication of said pistons, (cylinders,respectively;) second, to render said pistons expansible with regard tofitting the wall of such cylinders, and, third, to provide suitablemeans for such purposes which are most efficient and durable inoperation. I attain these objects substantially by the means and in themanner as shown in the accompanying drawings, in which Figure 1represents a longitudinal part sectional and part exterior view of apiston embodying the features above alluded to; and Figs. 2, 3, and 4,respectively, represent transverse sectional views on linesoc m, y y,and .e 2.

Like letters of reference denote like parts in the drawings andspecification.

o The illustration of the piston herewith given substantially comprisesthe frame A, the semicircular casings B B and -0, the fillers D D, andthe springs E E.

Circular plates or disks a a constitute the piston-terminal of the frameA, the outer plate a of which is held secure and concentric inconnection with the inner plate a by means of the core I). (See Fig. 1.)As shown, the outer terminal 0 of the frame is adapted for a yokeconnection with a cran k-shaft or equivalent.

It is obvious that the sides cl d be of such form as to embody greatestresistance in a comparatively light structure.

The casings B B and C O consist of the arch-plate e and the flanges f f.Said casings are'of corresponding width, so as to fit closely betweenthe plates at a.

The fillers D D are prepared of suitable lubrieating ingredients andcompressed into solid state to suit the cavity of the casings. (SeeFigs. 1, 2, and 3.)

The springs E E are of an elongated return form, in preference fiatsteel being used for the purpose of forcing the casings with contentsag'ainst the wall of the cylinder. Through the ports 9 g and 72. hadmission is had for the springs into the piston proper. Said ports alsoserve in the nature of guides for the purpose of retaining the casingand springs in aboutthe relative position as shown. Any suitable mode orform of connection may be adapted for the purposevof retaining the terminals i of the springs in operative connection with said casings. -(SeeFigs. 1, 2, and 3.)

It is intended that the casing-joints relatively should be about atright angles in order to effect a uniform expansion of the casingsaround the cylinder-wall, also to prevent leakage past said joints.

Auxiliary blocks F are employed in connection with the front casings OO. Said blocks cover the joints of said casings and admit of theexpansion thereofunder exclusion of exposure of said joints. (See Figs.1 and 3.)

The piston is rendered self-lubricating owing to the lubricatingconsistency of the fillers D D. The material of which said fillers aremade is sufficiently hard in nature to answer the purpose of makingtight contact with the cylinder-wall in order to prevent leakage pastthe piston.

The form and position of the springs admits at all times of inspectionthereof and a ready adjustment, if necessary. Furthermore, the activepart (loop j) is so far removed from the heat of the cylinder that fromthis source no injury can be done to said springs.

It is obvious that the frame A of and for the piston may consist of anintegral skeleton formed substantially as shown, or a structureanswering the same purpose may be constructed of more than one partwithout.departing from the nature of my invention.

That I claim, and desire to secure by Letters Patent, is-

1. A piston comprising a which terminates in separated disks, a pluframeone end of rality of semicircular casings carrying solid lubricants andfitting between said disks and elongated return-bend springs arranged insuitable connection with said casings for expanding the latter as andfor the purpose set forth.

2. In a piston the combination of a frame one end of which terminates inseparated disks, a plurality of casings intermediate said disks,lubricating-fillers and joint-covering blocks for said casings andelongated returnbend springs all constructed and arranged substantiallyas and for the purpose set forth.

3. A piston consisting of a frame of which one end terminates inseparated disks, two or Signed by me, at Cleveland, Ohio, this 26th dayof April, 1898.

WALTER HAY.

WVitnesses:

BERNH. F. EIBLER, GUSTAV SOHMITZ.

